Help! Need some info on my 454 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BigDaddyCMU · 03-11-2003, 03:47 PM

I am rebuilding a 454 for an engines class. I need to know the stock combustion chamber volume and deck height. The heads are stock cast iron, from 1975. Does anyone know of a website that may have this info? Thanks

special70gmc · 03-11-2003, 06:25 PM

i think www.mortec.com does bbc too i know they do sbc but ull need the casting #'s

69c10Lwb · 03-12-2003, 01:35 AM

the passenger cars and light trucks are normally 9.8 on the deck height and med-h.d. trucks are 10.2 deck height, normal combustion chamber cc is aproximately 119 cc but that isnt necessarilly consistent plus adding in the fact that they are 25+ years old and may have been resurfaced thus lowering the cc volume, so its always best to check by having the combustion chamber volume checked by a machine shop after you decide which valves you are going to use because a valve with a dish in it will also influence the final combustion chamber cc's.

03-11-2003, 03:47 PM	#1
BigDaddyCMU Registered User Join Date: Oct 2002 Location: Memphis, MI Posts: 136	Help! Need some info on my 454 I am rebuilding a 454 for an engines class. I need to know the stock combustion chamber volume and deck height. The heads are stock cast iron, from 1975. Does anyone know of a website that may have this info? Thanks

03-11-2003, 06:25 PM	#2
special70gmc Registered User Join Date: Sep 2002 Location: long island, new york Posts: 1,333	i think www.mortec.com does bbc too i know they do sbc but ull need the casting #'s __________________ 1986 c-10 swb 5/7 drop 20'' coys 1958 belair 2door

03-12-2003, 01:35 AM	#3
69c10Lwb Registered User Join Date: Feb 2003 Location: san antonio,texas Posts: 37	the passenger cars and light trucks are normally 9.8 on the deck height and med-h.d. trucks are 10.2 deck height, normal combustion chamber cc is aproximately 119 cc but that isnt necessarilly consistent plus adding in the fact that they are 25+ years old and may have been resurfaced thus lowering the cc volume, so its always best to check by having the combustion chamber volume checked by a machine shop after you decide which valves you are going to use because a valve with a dish in it will also influence the final combustion chamber cc's. __________________ 1973 pro-street nova back halved 632 cid 9inchford, disc brakes,2stges of spray,t-400 w/brake . almost done. 1952 chevy pick up soon to have a 468 bbc (hopefully momma will be happy with it and let me play with my toys more) nds.1983 ford bronco 400m auto matic 4wheel drive (war wagon, seen many battles and lost most ) another 1969 lwb project. suspension ?? motor ?? driveline ?? when you get it for free you dont turn it down... right???? 1992 suburban 4x4 no mods yet



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